The "Cool Blue" fragrance is all about freshness with its invigorating marine and aquatic notes. It's like a breath of cool, clean air that instantly brings a sense of refreshment. Picture a gentle, cool breeze that leaves you feeling crisp and revitalized. It's the kind of scent that brings a soothing sense of calm and relaxation.The vermiculite powder in the packet absorbs the aromatic essential oil to gently release fragrance in the air.The sachets last for 25 to 30 days under normal ambient conditions, when not physically tampered with. Make sure they don’t tear or dampen as they will lose their potency